Well that's interesting, you've got N-_-K, of N-P-K, from what I can tell. Alfalfa would be the N, potassium is obviously the K. The P is in tap water.
http://toxics.supportportal.co...
I think you may be onto something, though I have an amateur/hobby grasp of such things. I was inspired to investigate though, due to your experiment. It makes me wonder if ferts with even numbers could actually be too much P?
How did you choose the amounts? That's just how much 1 pill is?
When I simply pureรฉ a banana & dilute into water for plants, they really dig it. That's a lot of K, and lowers the PH a bit. Some N would be a good idea.